Pneumatic coating apparatus



Feb 5 9 B924,

y -J.`A. PA-"SCHEv PNEUMATIC 4coATING APPARATUS 'Filed Nov. 27,'-1918 4s'heets-she'et 2 Feb., 5 'wm l J. A; PAASCHE PNEUMATIC COATING APPARATUS lfatemteail Feb. 5, T324.

UNTT@ STATES TENS A. PAASCHE, 0F CHICAGD, ILLINOIS.

PNElIJ'IlIIAJITItl COATING' APPARATUS.

y Application filed November 27, 1918. Serial No. 264,298.

To all whom t may concern;

Be it -known that I, JENS A. Fanseite, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,V have invented certain new and useful Improvements in Pneumatic Coating Apparatus, of which the following is a speci fication.

This invention relates to the art of pneumatically applying paint, varnish or other coating material to surfaces, and it is one of the objects of the invention to produce an apparatus for this purpose which is complete and unitary in char'acter and is mounted upon a truck so that it may be readily transported from place to place toV adapt it for applying a coating to the walls of buildings, fences or other large surfaces; and in which the parts are so arranged upon the truck as to be very compact and at the same time leave the necessary parts readily accessible to the operator.

Another object of the invention is to produce in an apparatus of this character a unitary fixture which comprises various devices for regulating and controlling the supply of air to the paint brush and to the paintcontaining tank and which is so mounted that all of the said controlling devices will be readily accessible to the operator.

In the preferred embodiment of the invention, the mentioned -fiXture provides a head for closing the upper end of the paint-containing tank, -a support for the paint brush when not in use, and devices for controlling the fiow of air to the paint-tank and the paint-brush, for varying the pressure in saidJeankT for measuring the degree of pressure 1n said tank, for exhausting the compressed airfrom said tank, and

for introducing and controlling the flow ofcompresed air into the body of the paint in the lower portion of said tank.

The invention further refers to the other features and advantages hereinafter set forth in the detailed description.

In the accompanying drawings, Figure 1 is a side elevation of a complete apparatus embodying the features of my invention. Fig. 2 is a plan view of said apparatus.

p Fig. 3 is a detail view of the paint tank and supporting means therefor. Fig. 4 is a horizontal section on line 4-4 of Fig. 3. Fig. 5 is a sectional detail view illustrating the adjustably mounted idler for the driving belt. Fig. 6 is a fragmental elevational view of the joint for the movable housing. Fig. 7 is a section on line 7-7 of Fig. 6. Fig. 8 isK a detail view of the caster wheel and tongue at front end of truck. Fig. 9 is a horizontal sectional View through the fixture at the u per end of the paint tank, the view being ta en in plane of line 9 9 ofFig. 10. Fig. 10 is a vertical section through the fixture on line 10-10 of Fig. 9. Fig. 11 is a vertical section at right angles to Fig. 10, being taken in plane of line 11-11 of Fig. 9. Fig. 12 is a detail view of the means for supporting the paint brush when not in use. In the embodiment of my invention which I have shown herein by way of illustration, the apparatus comprises a truck frame 15 mounted on a pair of rear wheels 16 and a single front caster wheel 17. rIhis caster wheel is mounted in a fork 18 having a vertical spindle which is rotatably mounted in a bearing 19 on the frame 15` A. U-shaped member 20 embraces the wheel 17 and is pivoted on the axis thereof, and this U-shaped member has attached thereto a handle 21 by which the truck may be drawn.

0n top of the truck frame are mounted a driving motor 22 (which may be a gas engine or any other type of motor) an air compressor 23, and a paint tank 24. The motor and the air compressor are mounted on opposite ends of the truck with the paint tank between them. Beneath the truck frame is mounted an elongated air tank 25 arranged in horizontal position and extending beneath the motor, compressor and paint tank. A belt 26 connects the motor and the air compresser, the lower run of the belt being arranged to have any slack taken up by adv justable idle roller 27 (Fig. 5) carried by an arm 28, which is pivoted at 29 in the truck frame and is arranged to be held at any desired height by the set screw 30. Alongside the air compressor 23 is a unit 31 containing the spark coils for the gas engine. The air compressor is connected by a pipe 32 with the forward end of the air tank 25. The conduit connection between the air tank and the paint tank includes in the present instance an air purifying device 33 which comprises a lower water-separating chamber 33 connected at its upper end to the air tank by a pie 34, and an upper separating chamber 33" communicating with the lower chamber mounted on the paint tank.

tion of the details of this device.

The air purifying device 33 is preierabl of the construction disclosed in my co-pendT ing application, Serial No. 259,539, tiled October 24, 1918, to which application reterence may be had for a complete descriplit may be briefly described as comprising two concentric members 35 and 35a wit-hin the chamber 33", said members having external helical ribs which provide helical passages adapted to convey the air which is ted by' the pipe 34 iirst downwardly along the outer helical passage to the lower end of the chamber 33a and thence upwardly alon the inner helical p-assage to the pipe 36. uring the How of the air through these passages the moisture in the air is condensed and collected by the metallic parts and the liquid Hows down to the lower end of the chamber 33a and may be drained ed through a pet cock 38.

The upper chamber 33b contains a straining or screening material as, for example, excelsior, through which the air must pass and which acts further to condense or collect water vapor, oil or other foreign substances. A pet cock 39 communicates with this chamber and provides means for draining the liquid therefrom. At the upper end ofthe chamber 331 is a pressure gauge 40.

The fixture 41 which is mounted on the paint tank comprises in the referred form a head 42 forming a closure or an opening in the top ott-he paint tank (see Figs. 9 and 11), the head being screw threaded to be turned into said opening. A stud 43 rises from the head and preferably a handle 44 is fixed to said stud for convenience in screwing the head 42 into the tank and Jfor carrying the head when detached. lin the upper end of the stud is a socket 45 to receive a pin on the handle of the paint brush for supporting the brush when not in use.

pressure-reducing device 46 has a shank threaded into the stud 43. This pressure-reducing device ma be of any preferred construction, that herein shown comprising a body having an inlet passage 47 which is controlled by a valve member 48. This valve member is mounted on a movable yoke 49 which is supported by a flexible diaphragm 50. Sprlngs 51 and 52 bear upon opposite ends of the yoke and against glands 53 and 54 which are threaded intol the body. The relative tension of the springs 51 and 52 is such that the valve member 48 is normally pressed against the inlet passage 47 and the degree of pressure of the valve member may be regulated by adjusting the position of the glands 53 and 54, it being in practice only necessary to brush. A pressure antisera turn the gland 54 to change the relationship of the springs. ln this way the diderence in pressure at opposite sides of the reducer may be varied at will. rlhe spring 52 surrounds a' guide pin 55 which is attached to the yoke 49 and slides through the gland 54. lt for any reason it should be desirable to increase the pressure in the paint tank to the itull line pressure, for instance, in case the paint discharge tubehas been clogged by some obstruction, it will be apparent that guide pin 55 may be manually actuated, rendering the automatic pressure reducer inoperative and allowing the pressure in the tank to rise to the full line pressure.

A fritti. is attached to said pressure-reducer, saidtitting comprising in the present instance a T 56 and two valves 57 and 58 mounted on opposite ends of the T. lrlhe valve 57 is connected to the flexible air conduit 37 and the other valve 58 is connected to atiexible conduit 59 leading to the paint age 60 has a stem threaded into the stu 43 opposite the pressure reducing device 46, and an air outlet cock 61 and a needle Valve member 62 are also threaded into the stud 43 and have functions to be presently explained.

rlihe stud 43 and head 42 are provided with a vertical passage 63, the upper end of which communicates with the pressure-reducing device 46, and the pressure gage 60. The lower end of said passage opens directly into the paint tank. The air outlet cock 61 communicates with the lowerportion of this passage. Another vertical passage 64 in the stud and head communicates with the first passage 63 through a port 65,-

which has a valve seat to cooperate with the conical end of the needle valve member 62. ln the present instance said needle valve member projects through the passage 63 into association with its valve sea-t. By turning said va'lve member, communication between the two passages may be established or cut od" for a purpose to be set forth shortly. A pipe 66 is threaded into thc head 42, and communicates with the passage' 64, the lower end of said pipe extending to a point relatively close to the bottom of the paint tank. l

The air under pressure passes from the conduit 37 through the pressure-reducer 46, and the pressure is thereby lowered to a suitable degree which it is desired to maintain in the paint tank, the purpose of such pressure in the ain-t tank above the paint being to force t e paint in the tank to the s raying device or brush to be hereinafter escribed. Normally the air outlet cock 61 and the needle valve member 62 would be closed. When it is desired to release the air trom the paint tank, the valve member 57 may be closed and the outlet cock 61 opened.

lltli llt) This may be done when the tank is to be refilled with paint.

1f it is desired to stir up the paint in the tank to prevent the settling of sediment and maintain the paint of even consistency or mixture throughout, the needle valve member 62 may be opened at any time during the operation of the apparatus and the air under pressure will then flow through the passage 64 and the pipe 66 and will be discharged from the pipe into the body of paint in the tank, the air bubbling up through the paint and effectively mixing the latter.

The paint tank 24 is provided with a paint inlet spout 67 normally closed by a plug 68. In the lower end of the tank is mounted a valved fitting 69, to which one end of a flexible conduit 70 is attached, the oppositeend of said conduit being attached to the paint brush 71. The paint brush may be of any desired construction, the one here shown being of the type disclosed in my Patent N o. 1,273,784 issued July 23rd, 1918. The brush comprises a tubular body provided with a handle 72, extending downwardly therefrom and adapted to beheld in the operators hand, somewhat like a pistol. In the lower end lof this handle is a pin 73 which is adapted to fit in the socket in the upper end of the fixture 43 on the paint tank (see Fig. 12). It provides a convenient and safe support for the paint brush when not in use. The air outlet nozzle of the brush is indicated at 74 and paint outlet nozzle is designated 75. The flow of air and paint is controlled by two finger levers or triggers y,76 and 77 respectively.

A further description of the brush is not deemed necessary herein inasmuch as the present invent-ion is not concerned with the details of the brush. Reference may be had to my above mentioned patent for a full understanding of the brush construction.

The paint tank 24 is preferably supported on the main truck frame by a pair of wheels 78 (Figs. 3 and 4) mounted on an axle79 which is secured to one side of the tank by means of a surrounding band 80,

. said band having a leg 8Oa secured thereto and adapted also to rest on the truck frame to provide a three-point bearing. A handle 80b may be provided, if desired. It sometimes happens that it is desirable to apply paints of two or more colors on the same building or other surface. For this purpose two or more paint tanks may be provided, and they may be interchangeably mounted upon the main truck and connected up with the remainder of the apparatus. By hav' ing the paint tank mounted on wheels it may be readily removed from the truck and run upon its wheels to any desired point.' Detachable couplings for the eXible conduits 37, 59 and 7() are provided so that said conduits may be readily disconnected when desired.

All parts of the apparatus above the plane of the truck frame are enclosed by a housing 81 which is pivotally connected with truck frame at the lower rear corners of the housing, so that the housing may be swung upwardly and rearwardly to give access to the apparatus when desired. The hinge joint for the housing is arranged so as to form a stop to limit the rearward swinging movement of the housing. In the present instance parts 82, which are located at the corners of the housing, project rearwardly from the pivots 83 (see Figs. 6 and 7) and are arranged to abut against parts on the truck frame when the housing has been swung into vertical position, as incated in dotted lines' Fig. 1. The pivots 83 are carried by parts 84 which are rigidly mounted on the truck frame and project rearwardly a short distance therefrom to provide the desired cooperative relationship between the parts 82 on the housing and their abutments on the truck frame. Two lugs 85 (Fig. 1) may be mounted on the forward end of the truck frame and housing respectively, said lugs lying adjacent to each other when the housing is down, and being perforated to receive a padlock. When the housing is thus locked in closed position, none of the vital parts of the apparatus are accessible.

While I have herein described the preferred form of my apparatus in particularity for the sake of clearness, 1 recognize the fact that various modifications and alternatives will be apparent to those skilled in the art, and I therefore4 do not confine the invention to the particular embodiment disclosed, but aim to cover in the appended claims all equivalents falling within the scope of the invention.

I claim as my invention:

1. A portable pneumatic painting apparatus comprising a wheeled truck, a driving motor and an air compressor mounted respectively on opposite ends of said truck and having a driving connection, an upright paint tank mounted on the truck between said motor and said compressor, a horizontally positioned air compression tank mounted on the truck in a plane beneath said motor, compressor, and paint tank, conduits connecting said air compression tank to said compressor and to said paint tank, and a pneumatic paint brush having suitable connections with said paint tank and with the compressed air supply.

2. A portable pneumatic painting apparatus comprising, in combination, a truck frame mounted on wheels, a motor, an air compressor, and a paint tank all mounted upon said truck frame, said motor being paint tank all mounted upon said truck;

said motor and compressor having a driving connection; an air tank connected to said compressor1 and said paint tank; a pneumatic paint brush connected to the paint tank and the air supply; and a housing mounted on the truck and enclosing said motor, air compressor, paint tank, aint brush and connections, said housing ing movable into inoperative position so as to give access to said enclosed devices.

4. A pneumatic painting apparatus comprising, in combination, a closed paint tank, a fixture mounted in a wall at the upper portion of said tank and having two air passages therein, means for supplying air under pressure to said passages, one of the passages being adapted to deliver air to the upper portion ofthe tank for effecting pressure on the paint, a pipe leading from the other passage to the lower portion of the tank for directing air into the body of the paint to stir the latter, and valve means for controlling the supply of air to each of said passages and for exhausting the air from the tank into the atmosphere.

5. A pneumatic painting apparatus comprising, in combination, a paint-containing tank, a head closing the upper end of said tank and having two air passages, a fitting mounted on the head for delivering air to both passages, one passage being adapted to conduct air to the upper portion of the tank to create pressure on the paint therein, a conduit leading from the other passage to a point near the lower end of the tank for i. Adischarging air into the body of the paint,

means connected to said fitting for supplying compressed air, a pneumatic paint brush, a conduit connecting said brush to said fitting for conducting air to the brush, and another conduit connecting the brush to the lower portion of said tank for conveying paint to the brush.

6. A pneumatic coating apparatus comprising, in combination, a closed paint tank, means for supplying compressed air, a pneumatic paint brush, and a unitary fixture mounted on said tank and comprising a head closing an opening in said tank, the fixture having air-conducting passages running through said head, an air-pressure regulator` mounted on said fixture and communicating with the outer end of said passages, a threebranch fitting attached to and communicataaleaeia ing with said regulator, one of the branches of said fitting being connected to said airsupplying means and another branch being connected to said paint brush, said brush being connected to the lower end of said paint tank, a pipe attached to said 'head communicating with one of said passages and projecting down within the tank to the lower portion thereof,a valve mounted on saio fixture for controlling the flow of air through the last named one of said passages, an air-pressure gage mounted on said fixture and communicating with the other one of said passages, and a valved device mounted on said fixture and-communicating at one end with the last named passage and at its other end with the atmosphere outside ot' said tank for exhausting compressed air from said tank.

7. In a pneumatic painting apparatus, a paint containing tank, an axle located oi'lI center with respect to the paint tank, a pair of wheels mounted on said axle, said tank having a part adapted to rest upon the same support as the wheels whereby to afford a stable three-point bearing, the tank being capable of being moved along on said wheels when tipped on said axle, a platform carried on Wheels having a clear space upon which said paint tank may be mounted and a com plete spraying equipment carried partly by said platform and partly by said tank.

8. A pneumatic painting apparatus comprising, in combination, a-closed paint tank, a fixture mounted on said tank and having a socket, and a pneumatic aint brush' having a part engaging in said) socket, for supporting'the brush when notv in use.

9. In a pneumatic painting apparatus, a paint tank, a fixture mounted thereon, and a pneumatic paint brush adapted to be' supported on said fixture when not in use, said brush and fixture having a co-operating pin and socket adapted to interengage to secure the brush.

10. In a pneumatic painting apparatus, a fixture comprising a head adapted to be mounted in the wall of a paint tank and a stud projecting from said head, said stud and head having an air passage terminating on the inner side of the head, an outlet valve mounted in the fixture and communicating with said passage, a branch passage leading from the first passage to the inner side of said head, and a valve arranged to close said branch passage.

11. In a pneumatic painting apparatus, a fixture adapted to be mounted in the wall of a closed paint tank and having two air passages terminating on the inner side of the fixture, and a pipe attached to the fixture and communicating with the inner end of one of said passages.

12. In a pneumatic paint'in apparatus a fixture adapted to be mounte in the w Lesser? of a closed paint tank and having two air passages terminating on the inner side of the fixture, a pipe attached to the ixture and communicating with the inner end of one of said passages, and a valve arranged to close the latter passage.

.18. In a pneumatic painting apparatus, a fixture adapted to be mounted in the wall of a closed paint tank and having two air air-pressure thereto, valves inftwo branches of sai passages terminating on the inner side of the fixture, a pipe attached to the fixture and communicating with the inner end of one of said passages, a valve arranged to close the latter passage, and a valved outlet communicating with the other passage for exhausting compressed air from the tank into the atmosphere.

14;. In a pneumatic painting apparatus, a fixture comprising a. head adapted to bethreaded in the wall of a paint tank and having a stud projecting outwardly therefrom, said stud having a first and a second air passage both opening on the inner side of said head, a pipe attached to the head and communicating with the inner end of said second air passage, a valve mounted in the stud for controlling the second passage, a valve outlet device mounted in said stud and communicating with the first passage, a pressure gage mounted on said stud and communicatlng with the first passage and a pressure reducer mounted on the stud and communicating with the outer end of the first passage, said pressure reduce/r being adapted to be connected to a source of compressed air supply.

15. In a lpneumaticcoating apparatus, a fixture adapted to close an opening in a paint tank and having passages therethrough, a three-branch fitting communicating with 'said passages for supplyin 1aiir tting, one of said branches being adapted to e connected to a supply of compressed air and another branch being adapted to be connected to a neumatic paint brush, an air-pressure re ator through which the air passes before entering said passages, a downwardly projecting.y pipe attached to said fixture and communicating with one of said passages through the fixture, a valve mounted on the fixture for controlling the flow of air through the latter passage, an gage mounted on said fixture and commumcating with the other one of said passages, and a valved device commuF nicating at one end with the latter passa-ge and at the other end with the atmosphere,

16. In a pneumatic coating apparatus, a platform carried on wheels, a source of power and an air compressor above said platform, an air tank subject to the full pressure developed by said compressor located beneath said platform, a paint tank above said platform and a connection between said air tankand said paint tank includin pressure reducing means.

17. n a pneumatic coating apparatus, a platform mounted on wheels, an air storage tank below said platform, a paint storage tank above said platform, a connection between said air storage tank and said paint storage tank and pressure reducing means interpolated in said connection adjacent said paint storage tank.

18. In a pneumatic coatingl apparatus in combination, a receptacle, a head adapted to form a closure for said receptacle, a source of compressed` air, a pressure regulator maintaining a constant pressure in said receptacle less than that of the source, and manual means for permitting the operation of said regulator to allow the pressure in the receptacle to become equal to that of the source-without disturbing the adjustment of said regulator.

19. In a pneumatic coating apparatus, a platform mounted on wheels, and an air compressor and an engine at opposite ends of said platform, said compressor and engine being arranged in spaced relation to provide for locating therebetween all of the other elements of a complete apparatus which are carried above said platform.

20. In a pneumatic coating apparatus, a platform mounted on wheels, an air compressor and an engine mounted at opposite ends of said platform and arranged to provide space therebetween on said platform,

'and additional elements located in said space and comprising the other portions of a complete apparatus which are mounted above said platform, certain of said elements being equip-pcd with wheels upon which they may be supported and whereby they may be readily removed from said platform.

21. In a pneumatic coatingapparatus, a platform mounted on wheels, an air compressor 'and an engine at opposite ends of said platform and arranged to provide space therebetween on said platform, and addi,- tional elements located in said space and comprising all of the other portions of a complete apparatus which are mounted above said platform, certain of said elements being equipped with wheels upon which they may be supported and whereby they may be readily removed from said platform, and a belt connection between said engine and compressor extending along the side of the platform and when in o erative position preventing removal of sai additional elements.

In testimony whereof, I have hereunto set my hand.

.inns A. Paas.

lill@ rae 

